Continuous measurement of the surface roughness of a cold-rolled product
US4803374A · kind A · utility
12Cited by
3References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 5, 1986 |
| Grant date | Feb 7, 1989 |
| Priority date | — |
| Expiry date | Dec 5, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B11/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light beam, e.g. from a laser, is transmitted onto the surface of a cold-rolled product such as steel strip. The light beam has a wavelength at least equal to the maximum roughness of the product surface. The reflected light energy is measured, preferably in the specular direction with respect to the incident beam; the surface roughness is deduced from that measurement. The light beam may be interrupted to provide two beams alternately incident on the same spot at different angles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.